New research based on seismic data indicates the presence of vast swathes of water under the surface of Mars. The water likely trickled from the surface billions of years ago.
Source
New research based on seismic data indicates the presence of vast swathes of water under the surface of Mars. The water likely trickled from the surface billions of years ago.
.. . . . . . . . . . . . . . . . . . . . . . . . . %%%. . . * . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ - - - - - - - - - - - - - - - - - - - - . . . . .